package com.example.eduservice.controller;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.eduservice.entity.EduTeacher;
import com.example.eduservice.entity.vo.TeacherQuery;
import com.example.eduservice.service.EduTeacherService;
import com.example.handler.GuliException;
import com.example.utils.R;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2022-06-22
 */

//跨域问题 我这里没出现 防止出现还是先加上
//@CrossOrigin   //ajax跨域
@RestController
@Api(description = "讲师管理")
@RequestMapping("/eduservice/teacher")
public class EduTeacherController {

    //把service注入
    @Autowired
    private EduTeacherService eduTeacherService;

    //1查询讲师表的所有数据
    //rest风格
    @ApiOperation(value = "所有讲师列表")
    @GetMapping("/findAll")
    //统一结果返回
    public R findAllTeacher(){
        //调用service的方法实现查询所有的操作
        List<EduTeacher> list = eduTeacherService.list(null);
            return  R.ok().data("item",list);
    }

    //2 逻辑删除讲师的方法
    @ApiOperation(value = "根据id删除讲师:逻辑删除")
    @DeleteMapping("/{id}")
     //统一结果返回
    public  R removerTeacher(@ApiParam(name = "id" ,value="讲师ID",required = true) @PathVariable String id){

        boolean flag=eduTeacherService.removeById(id);
        if (flag) {
            return R.ok();
        }else {
            return  R.error();
        }
    }

     //3 分页查询讲师方法
     @ApiOperation(value = "分页查询讲师方法")
    @GetMapping("/pageTeacher/{current}/{limit}")
    public  R  pageLsitTeacher(@PathVariable long current,@PathVariable long limit){

        //创建page对象
        Page<EduTeacher> teacherPage=new Page<>(current,limit);

        //自定义异常
//         try {
//             int i=10/0;
//         }catch (Exception e){
//             //执行自定义异常
//             throw  new GuliException(20001,"执行了自定义异常处理....");
//         }



        //调用方法实现分页
        //调用方法的时候，底层封装，把分页所有数据封装到pageteacher对象里面
        eduTeacherService.page(teacherPage,null);

        long total=teacherPage.getTotal();  //总记录数
        List<EduTeacher> records=teacherPage.getRecords();  //数据list集合

        //方法一
//        Map  map=new HashMap();
//        map.put("total",total);
//        map.put("rows",records);
//        return R.ok().data(map);

        return  R.ok().data("total",total).data("rows",records);

    }

     //4 条件查询带分页
     @ApiOperation(value = "条件查询带分页")
    @PostMapping("/pageTeacherCondition/{current}/{limit}")
    public  R  pageTeacherCondition(@PathVariable long current,@PathVariable long limit,
        @RequestBody(required = false)  TeacherQuery teacherQuery){
//required = false)参数值可以为空        RequestBody通过json传递数据，前端也如此    通过对象传递查询条件

        //创建page对象    curerent当前页，limit可以显示多少数据
        Page<EduTeacher> pageteacher=new Page<>(current,limit);
       //构造条件
        QueryWrapper<EduTeacher> wrapper=new QueryWrapper<>();
      //wrapper
      //mybatis动态sql
        //判断条件值是否为空，如果不为空拼接条件
        String name= teacherQuery.getName();
        //什么等级的讲师
        Integer level=teacherQuery.getLevel();
        String begin= teacherQuery.getBegin();
        String end= teacherQuery.getEnd();

        if(!StringUtils.isEmpty(name)){
            //构造条件
            wrapper.like("name",name);
        }
        if(!StringUtils.isEmpty(level)){
            wrapper.eq("level",level);
        }
        if(!StringUtils.isEmpty(begin)){
            wrapper.ge("gmt_create",begin);
        }
        if(!StringUtils.isEmpty(end)){
            wrapper.le("gmt_modified",end);
        }
        //排序
         wrapper.orderByDesc("gmt_create");


        //调用方法实现分页查询
        eduTeacherService.page(pageteacher,wrapper);
        long  total=pageteacher.getTotal();  //总记录数
        List<EduTeacher> records=pageteacher.getRecords();  //数据list集合


        return  R.ok().data("total",total).data("rows",records);
    }

    //5 添加讲师接口的方法
    @ApiOperation(value = "添加讲师")
    @PostMapping("/addTeacher")
    public  R addTeacher(@RequestBody EduTeacher eduTeacher){
        boolean save = eduTeacherService.save(eduTeacher);
        if(save){
            return  R.ok();
        }else{
            return  R.error();
        }

    }

    //6 根据讲师id进行查询
    @ApiOperation(value = "根据id查询讲师")
    @GetMapping("/getTeacher/{id}")
    public  R getTeacher(@PathVariable String id){
        EduTeacher eduTeacher = eduTeacherService.getById(id);
        return  R.ok().data("teacher",eduTeacher);
    }

    //7 讲师修改功能
    @ApiOperation(value = "修改讲师")
     @PostMapping("/updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher){
         boolean flag = eduTeacherService.updateById(eduTeacher);
         if(flag){
             return  R.ok();
         }else{
             return  R.error();
         }

     }


}

